/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include <sys/types.h>

#include <sys/socket.h>

#include <string.h>

#include <netinet/in.h>

#include <netinet/tcp.h>

#include "jni.h"

#include "jni_util.h"

#include "jvm.h"

#include "jlong.h"

#include "sun_nio_ch_Net.h"

#include "net_util.h"

#include "net_util_md.h"

#include "nio_util.h"

#include "nio.h"

/**

 * Definitions for source-specific multicast to allow for building

 * with older header files.

 */

#ifdef __solaris__

#ifndef IP_BLOCK_SOURCE

#define IP_BLOCK_SOURCE                 0x15

#define IP_UNBLOCK_SOURCE               0x16

#define IP_ADD_SOURCE_MEMBERSHIP        0x17

#define IP_DROP_SOURCE_MEMBERSHIP       0x18

#define MCAST_BLOCK_SOURCE              0x2b

#define MCAST_UNBLOCK_SOURCE            0x2c

#define MCAST_JOIN_SOURCE_GROUP         0x2d

#define MCAST_LEAVE_SOURCE_GROUP        0x2e

#endif  /* IP_BLOCK_SOURCE */

struct my_ip_mreq_source {

        struct in_addr  imr_multiaddr;

        struct in_addr  imr_sourceaddr;

        struct in_addr  imr_interface;

};

/*

 * Use #pragma pack() construct to force 32-bit alignment on amd64.

 */

#if defined(amd64)

#pragma pack(4)

#endif

struct my_group_source_req {

        uint32_t                gsr_interface;  /* interface index */

        struct sockaddr_storage gsr_group;      /* group address */

        struct sockaddr_storage gsr_source;     /* source address */

};

#if defined(amd64)

#pragma pack()

#endif

#endif  /* __solaris__ */

#ifdef __linux__

#ifndef IP_BLOCK_SOURCE

#define IP_BLOCK_SOURCE                 38

#define IP_UNBLOCK_SOURCE               37

#define IP_ADD_SOURCE_MEMBERSHIP        39

#define IP_DROP_SOURCE_MEMBERSHIP       40

#define MCAST_BLOCK_SOURCE              43

#define MCAST_UNBLOCK_SOURCE            44

#define MCAST_JOIN_SOURCE_GROUP         42

#define MCAST_LEAVE_SOURCE_GROUP        45

#endif  /* IP_BLOCK_SOURCE */

struct my_ip_mreq_source {

        struct in_addr  imr_multiaddr;

        struct in_addr  imr_interface;

        struct in_addr  imr_sourceaddr;

};

struct my_group_source_req {

        uint32_t                gsr_interface;  /* interface index */

        struct sockaddr_storage gsr_group;      /* group address */

        struct sockaddr_storage gsr_source;     /* source address */

};

#endif   /* __linux__ */

#define COPY_INET6_ADDRESS(env, source, target) \

    (*env)->GetByteArrayRegion(env, source, 0, 16, target)

/*

 * Copy IPv6 group, interface index, and IPv6 source address

 * into group_source_req structure.

 */

#ifdef AF_INET6

static void initGroupSourceReq(JNIEnv* env, jbyteArray group, jint index,

                               jbyteArray source, struct my_group_source_req* req)

{

    struct sockaddr_in6* sin6;

    req->gsr_interface = (uint32_t)index;

    sin6 = (struct sockaddr_in6*)&(req->gsr_group);

    sin6->sin6_family = AF_INET6;

    COPY_INET6_ADDRESS(env, group, (jbyte*)&(sin6->sin6_addr));

    sin6 = (struct sockaddr_in6*)&(req->gsr_source);

    sin6->sin6_family = AF_INET6;

    COPY_INET6_ADDRESS(env, source, (jbyte*)&(sin6->sin6_addr));

}

#endif

JNIEXPORT void JNICALL

Java_sun_nio_ch_Net_initIDs(JNIEnv *env, jclass clazz)

{

    /* Here because Windows native code does need to init IDs */

}

JNIEXPORT jboolean JNICALL

Java_sun_nio_ch_Net_isIPv6Available0(JNIEnv* env, jclass cl)

{

    return (ipv6_available()) ? JNI_TRUE : JNI_FALSE;

}

JNIEXPORT jboolean JNICALL

Java_sun_nio_ch_Net_canIPv6SocketJoinIPv4Group0(JNIEnv* env, jclass cl)

{

    return JNI_TRUE;

}

JNIEXPORT jboolean JNICALL

Java_sun_nio_ch_Net_canJoin6WithIPv4Group0(JNIEnv* env, jclass cl)

{

#ifdef __solaris__

    return JNI_TRUE;

#else

    return JNI_FALSE;

#endif

}

JNIEXPORT int JNICALL

Java_sun_nio_ch_Net_socket0(JNIEnv *env, jclass cl, jboolean preferIPv6,

                            jboolean stream, jboolean reuse)

{

    int fd;

    int type = (stream ? SOCK_STREAM : SOCK_DGRAM);

#ifdef AF_INET6

    int domain = (ipv6_available() && preferIPv6) ? AF_INET6 : AF_INET;

#else

    int domain = AF_INET;

#endif

    fd = socket(domain, type, 0);

    if (fd < 0) {

        return handleSocketError(env, errno);

    }

#ifdef AF_INET6

    /* Disable IPV6_V6ONLY to ensure dual-socket support */

    if (domain == AF_INET6) {

        int arg = 0;

        if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&arg,

                       sizeof(int)) < 0) {

            JNU_ThrowByNameWithLastError(env,

                                         JNU_JAVANETPKG "SocketException",

                                         "sun.nio.ch.Net.setIntOption");

            close(fd);

            return -1;

        }

    }

#endif

    if (reuse) {

        int arg = 1;

        if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&arg,

                       sizeof(arg)) < 0) {

            JNU_ThrowByNameWithLastError(env,

                                         JNU_JAVANETPKG "SocketException",

                                         "sun.nio.ch.Net.setIntOption");

            close(fd);

            return -1;

        }

    }

#if defined(__linux__) && defined(AF_INET6)

    /* By default, Linux uses the route default */

    if (domain == AF_INET6 && type == SOCK_DGRAM) {

        int arg = 1;

        if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &arg,

                       sizeof(arg)) < 0) {

            JNU_ThrowByNameWithLastError(env,

                                         JNU_JAVANETPKG "SocketException",

                                         "sun.nio.ch.Net.setIntOption");

            close(fd);

            return -1;

        }

    }

#endif

    return fd;

}

JNIEXPORT void JNICALL

Java_sun_nio_ch_Net_bind0(JNIEnv *env, jclass clazz, jboolean preferIPv6,

                          jobject fdo, jobject iao, int port)

{

    SOCKADDR sa;

    int sa_len = SOCKADDR_LEN;

    int rv = 0;

    if (NET_InetAddressToSockaddr(env, iao, port, (struct sockaddr *)&sa, &sa_len, preferIPv6) != 0) {

      return;

    }

    rv = NET_Bind(fdval(env, fdo), (struct sockaddr *)&sa, sa_len);

    if (rv != 0) {

        handleSocketError(env, errno);

    }

}

JNIEXPORT void JNICALL

Java_sun_nio_ch_Net_listen(JNIEnv *env, jclass cl, jobject fdo, jint backlog)

{

    if (listen(fdval(env, fdo), backlog) < 0)

        handleSocketError(env, errno);

}

JNIEXPORT jint JNICALL

Java_sun_nio_ch_Net_connect0(JNIEnv *env, jclass clazz, jboolean preferIPv6,

                             jobject fdo, jobject iao, jint port)

{

    SOCKADDR sa;

    int sa_len = SOCKADDR_LEN;

    int rv;

    if (NET_InetAddressToSockaddr(env, iao, port, (struct sockaddr *) &sa,

                                  &sa_len, preferIPv6) != 0)

    {

      return IOS_THROWN;

    }

    rv = connect(fdval(env, fdo), (struct sockaddr *)&sa, sa_len);

    if (rv != 0) {

        if (errno == EINPROGRESS) {

            return IOS_UNAVAILABLE;

        } else if (errno == EINTR) {

            return IOS_INTERRUPTED;

        }

        return handleSocketError(env, errno);

    }

    return 1;

}

JNIEXPORT jint JNICALL

Java_sun_nio_ch_Net_localPort(JNIEnv *env, jclass clazz, jobject fdo)

{

    SOCKADDR sa;

    socklen_t sa_len = SOCKADDR_LEN;

    if (getsockname(fdval(env, fdo), (struct sockaddr *)&sa, &sa_len) < 0) {

        handleSocketError(env, errno);

        return -1;

    }

    return NET_GetPortFromSockaddr((struct sockaddr *)&sa);

}

JNIEXPORT jobject JNICALL

Java_sun_nio_ch_Net_localInetAddress(JNIEnv *env, jclass clazz, jobject fdo)

{

    SOCKADDR sa;

    socklen_t sa_len = SOCKADDR_LEN;

    int port;

    if (getsockname(fdval(env, fdo), (struct sockaddr *)&sa, &sa_len) < 0) {

        handleSocketError(env, errno);

        return NULL;

    }

    return NET_SockaddrToInetAddress(env, (struct sockaddr *)&sa, &port);

}

JNIEXPORT jint JNICALL

Java_sun_nio_ch_Net_getIntOption0(JNIEnv *env, jclass clazz, jobject fdo,

                                  jboolean mayNeedConversion, jint level, jint opt)

{

    int result;

    struct linger linger;

    u_char carg;

    void *arg;

    socklen_t arglen;

    int n;

    /* Option value is an int except for a few specific cases */

    arg = (void *)&result;

    arglen = sizeof(result);

    if (level == IPPROTO_IP &&

        (opt == IP_MULTICAST_TTL || opt == IP_MULTICAST_LOOP)) {

        arg = (void*)&carg;

        arglen = sizeof(carg);

    }

    if (level == SOL_SOCKET && opt == SO_LINGER) {

        arg = (void *)&linger;

        arglen = sizeof(linger);

    }

    if (mayNeedConversion) {

        n = NET_GetSockOpt(fdval(env, fdo), level, opt, arg, (int*)&arglen);

    } else {

        n = getsockopt(fdval(env, fdo), level, opt, arg, &arglen);

    }

    if (n < 0) {

        JNU_ThrowByNameWithLastError(env,

                                     JNU_JAVANETPKG "SocketException",

                                     "sun.nio.ch.Net.getIntOption");

        return -1;

    }

    if (level == IPPROTO_IP &&

        (opt == IP_MULTICAST_TTL || opt == IP_MULTICAST_LOOP))

    {

        return (jint)carg;

    }

    if (level == SOL_SOCKET && opt == SO_LINGER)

        return linger.l_onoff ? (jint)linger.l_linger : (jint)-1;

    return (jint)result;

}

JNIEXPORT void JNICALL

Java_sun_nio_ch_Net_setIntOption0(JNIEnv *env, jclass clazz, jobject fdo,

                                  jboolean mayNeedConversion, jint level, jint opt, jint arg)

{

    int result;

    struct linger linger;

    u_char carg;

    void *parg;

    int arglen, n;

    /* Option value is an int except for a few specific cases */

    parg = (void*)&arg;

    arglen = sizeof(arg);

    if (level == IPPROTO_IP &&

        (opt == IP_MULTICAST_TTL || opt == IP_MULTICAST_LOOP)) {

        parg = (void*)&carg;

        arglen = sizeof(carg);

        carg = (u_char)arg;

    }

    if (level == SOL_SOCKET && opt == SO_LINGER) {

        parg = (void *)&linger;

        arglen = sizeof(linger);

        if (arg >= 0) {

            linger.l_onoff = 1;

            linger.l_linger = arg;

        } else {

            linger.l_onoff = 0;

            linger.l_linger = 0;

        }

    }

    if (mayNeedConversion) {

        n = NET_SetSockOpt(fdval(env, fdo), level, opt, parg, arglen);

    } else {

        n = setsockopt(fdval(env, fdo), level, opt, parg, arglen);

    }

    if (n < 0) {

        JNU_ThrowByNameWithLastError(env,

                                     JNU_JAVANETPKG "SocketException",

                                     "sun.nio.ch.Net.setIntOption");

    }

}

JNIEXPORT jint JNICALL

Java_sun_nio_ch_Net_joinOrDrop4(JNIEnv *env, jobject this, jboolean join, jobject fdo,

                                jint group, jint interf, jint source)

{

    struct ip_mreq mreq;

    struct my_ip_mreq_source mreq_source;

    int opt, n, optlen;

    void* optval;

    if (source == 0) {

        mreq.imr_multiaddr.s_addr = htonl(group);

        mreq.imr_interface.s_addr = htonl(interf);

        opt = (join) ? IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP;

        optval = (void*)&mreq;

        optlen = sizeof(mreq);

    } else {

        mreq_source.imr_multiaddr.s_addr = htonl(group);

        mreq_source.imr_sourceaddr.s_addr = htonl(source);

        mreq_source.imr_interface.s_addr = htonl(interf);

        opt = (join) ? IP_ADD_SOURCE_MEMBERSHIP : IP_DROP_SOURCE_MEMBERSHIP;

        optval = (void*)&mreq_source;

        optlen = sizeof(mreq_source);

    }

    n = setsockopt(fdval(env,fdo), IPPROTO_IP, opt, optval, optlen);

    if (n < 0) {

        if (join && (errno == ENOPROTOOPT))

            return IOS_UNAVAILABLE;

        handleSocketError(env, errno);

    }

    return 0;

}

JNIEXPORT jint JNICALL

Java_sun_nio_ch_Net_blockOrUnblock4(JNIEnv *env, jobject this, jboolean block, jobject fdo,

                                    jint group, jint interf, jint source)

{

    struct my_ip_mreq_source mreq_source;

    int n;

    int opt = (block) ? IP_BLOCK_SOURCE : IP_UNBLOCK_SOURCE;

    mreq_source.imr_multiaddr.s_addr = htonl(group);

    mreq_source.imr_sourceaddr.s_addr = htonl(source);

    mreq_source.imr_interface.s_addr = htonl(interf);

    n = setsockopt(fdval(env,fdo), IPPROTO_IP, opt,

                   (void*)&mreq_source, sizeof(mreq_source));

    if (n < 0) {

        if (block && (errno == ENOPROTOOPT))

            return IOS_UNAVAILABLE;

        handleSocketError(env, errno);

    }

    return 0;

}

JNIEXPORT jint JNICALL

Java_sun_nio_ch_Net_joinOrDrop6(JNIEnv *env, jobject this, jboolean join, jobject fdo,

                                jbyteArray group, jint index, jbyteArray source)

{

#ifdef AF_INET6

    struct ipv6_mreq mreq6;

    struct my_group_source_req req;

    int opt, n, optlen;

    void* optval;

    if (source == NULL) {

        COPY_INET6_ADDRESS(env, group, (jbyte*)&(mreq6.ipv6mr_multiaddr));

        mreq6.ipv6mr_interface = (int)index;

        opt = (join) ? IPV6_ADD_MEMBERSHIP : IPV6_DROP_MEMBERSHIP;

        optval = (void*)&mreq6;

        optlen = sizeof(mreq6);

    } else {

#ifdef __linux__

        /* Include-mode filtering broken on Linux at least to 2.6.24 */

        return IOS_UNAVAILABLE;

#else

        initGroupSourceReq(env, group, index, source, &req);

        opt = (join) ? MCAST_JOIN_SOURCE_GROUP : MCAST_LEAVE_SOURCE_GROUP;

        optval = (void*)&req;

        optlen = sizeof(req);

#endif

    }

    n = setsockopt(fdval(env,fdo), IPPROTO_IPV6, opt, optval, optlen);

    if (n < 0) {

        if (join && (errno == ENOPROTOOPT))

            return IOS_UNAVAILABLE;

        handleSocketError(env, errno);

    }

    return 0;

#else

    JNU_ThrowInternalError(env, "Should not get here");

    return IOS_THROWN;

#endif  /* AF_INET6 */

}